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swift-mirror/lib/Sema/CSSimplify.cpp
Doug Gregor b83bb70bac [Constraint solver] Look through optional binding for overload sets. 
When we’re trying to find the overload set corresponding to a particular
type variable, look through “optional object of” constraints that represent
the use of ? binding or ! forcing. This allows us to find overload sets
when referring to, e.g., @objc optional protocol requirements.
2019-03-05 21:40:48 -08:00

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